When in the inheritance tree there is a definition without properties but extending another specifying the type "object", a null pointer exception is thrown due to the fact that the swagger model returns null when getting the properties (instead of an empty map)
Coverage increased (+0.2%) to 89.612% when pulling 7b3221dca8903249d72bb168e11130c5b2abc3cf on channelsuite:schema-resolver-avoid-nullpointerexception into ba1594c73717efdce9548359eb6f19beb1512eb3 on RobWin:master.
When in the inheritance tree there is a definition without properties but extending another specifying the type "object", a null pointer exception is thrown due to the fact that the swagger model returns null when getting the properties (instead of an empty map)